X Chromosome Reactivation Dynamics Reveal Stages of Reprogramming to Pluripotency

ABSTRACT: Reprogramming to iPSCs resets the epigenome of somatic cells including the reversal of X chromosome-inactivation. We sought to gain insight into the steps underlying the reprogramming process by examining the means by which reprogramming leads to X chromosome-reactivation (XCR). Analyzing single cells in situ, we found that hallmarks of the inactive X (Xi) change sequentially, providing a direct readout of reprogramming progression. Several epigenetic changes on the Xi occur in the inverse order of developmental X-inactivation, while others are uncoupled from this sequence. Among the latter, DNA methylation has an extraordinary long persistence on the Xi during reprogramming, and, like Xist expression, is erased only after pluripotency genes are activated. Mechanistically, XCR requires bot

ORGANISM(S): Mus musculus

SUBMITTER: Rahul Karnik 

PROVIDER: E-GEOD-58109 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress